コカの木きコカのきMeanings1expression, nouncoca treeRefers to the plant Erythroxylum coca, whose leaves are used to produce cocaine. The term is a straightforward compound of コカ (coca) and 木 (tree).コカの木きは南なん米べいのアンデス地ち方ほうで栽さい培ばいされている。The coca tree is cultivated in the Andes region of South America.